EP1491902A1 - Capteur de courant pour un appareil de contrôle - Google Patents

Capteur de courant pour un appareil de contrôle Download PDF

Info

Publication number
EP1491902A1
EP1491902A1 EP04008835A EP04008835A EP1491902A1 EP 1491902 A1 EP1491902 A1 EP 1491902A1 EP 04008835 A EP04008835 A EP 04008835A EP 04008835 A EP04008835 A EP 04008835A EP 1491902 A1 EP1491902 A1 EP 1491902A1
Authority
EP
European Patent Office
Prior art keywords
yoke
current sensor
circuit carrier
magnetic field
recess
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04008835A
Other languages
German (de)
English (en)
Inventor
Martin Knapp
Gerhard Holzwarth
Walter Zein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1491902A1 publication Critical patent/EP1491902A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices

Definitions

  • the subject matter of the invention is a current sensor with a yoke with an air gap, a magnetic field probe arranged in the air gap and a circuit carrier on which the magnetic field probe is attached.
  • a current sensor can e.g. in an electrical control device, in particular for a motor vehicle, and form an integral part of such a device.
  • a current sensor for measuring an electrical current flowing in a conductor is described in EP 0 815 456 B1.
  • This current sensor comprises a magnetic yoke with an air gap as well as a cuboid magnetic field probe arranged in the air gap and a circuit carrier which carries an electrical circuit which is designed to amplify an output signal of the said magnetic field probe, the circuit carrier having a cut-out area.
  • the cut-out area serves to accommodate the conductor wound around the yoke to form a coil.
  • the parallelepiped-shaped magnetic field probe is fastened to the circuit carrier with a narrow side and projects vertically and vertically from the circuit carrier so that it can engage in the air gap of the yoke.
  • the yoke is attached to pins that protrude vertically from the circuit carrier.
  • the invention creates a magnetic field sensor which is particularly robust and insensitive to shocks or other types of external mechanical force.
  • the yoke is immersed in the cutout of the circuit carrier so as to minimize the width of the air gap of the yoke.
  • the recess can be a window in the circuit carrier.
  • the recess of the circuit carrier can also be open at the edge.
  • the yoke can be a one-piece yoke.
  • a multi-part, in particular a two-part yoke is preferred, since installation of the current sensor in a housing is particularly simple and quick with such a yoke, because the yoke does not need to be inserted as a whole into the housing, but initially only a respective sub-segment , This gives you room to maneuver for installing the other components, since the yoke as a whole is not a hindrance.
  • the multi-part yoke can have a tongue and groove connection.
  • a conductor runs straight through the yoke.
  • the yoke detects the magnetic field generated by the conductor and concentrates it on the magnetic field probe. At the same time, it shields the control circuit located outside the yoke against the magnetic field of the conductor.
  • the conductor can also be robust, for example Trade busbar that can carry high electrical currents. It is possible to provide the conductor anchored to the housing.
  • the yoke has a pin in the air gap which engages in the cutout of the circuit carrier.
  • the circuit carrier likewise particularly preferably carries a further processing circuit for processing measurement results that come from the magnetic field probe.
  • the further processing circuit can be, for example, a control unit of a motor vehicle.
  • the current sensor can e.g. to monitor the state of charge of a battery by measuring a battery current.
  • Such monitoring is particularly important in so-called "x-by-wire" motor vehicles, in which vital functions such as steering, brakes, clutches or gas are electrically controlled, since a fault in the battery can lead to the failure of the functions and therefore a functional weakness the battery must be recognized before a failure occurs.
  • a yoke that has a coil for demagnetizing the yoke is advantageous. If the yoke is made up of sub-segments, the coil can be arranged on one of the sub-segments.
  • FIG. 1 A cross section through a control device with a current sensor 2 according to the invention is shown in FIG. 1.
  • the current sensor 2 comprises a yoke made of a ferromagnetic material such as ferrite-filled silicone, here consisting of two parts made up of a lower partial segment 4 and an upper partial segment 5, and a Hall probe 6 as a magnetic field probe, which is fastened on a circuit carrier 1, and an air gap of the yoke fills.
  • the circuit carrier 1 is of any type known per se, for example a printed circuit board, a metal or ceramic substrate.
  • the lower sub-segment 4 and the upper sub-segment 5 of the yoke are joined together by means of a tongue and groove connection 7.
  • a coil 10 is provided which is wound around a projection 11 of the upper segment 5.
  • the yoke is interrupted by the air gap which is filled by the Hall probe 6.
  • the circuit carrier 1 there is a control circuit in addition to the Hall probe 6.
  • a housing 3 with a cover 12 accommodates the current sensor 2.
  • the yoke is traversed by a conductor 8, which is a straight conductor rail for guiding high currents, and which projects out of the housing 3 on both sides.
  • the conductor 8 is supported in lateral recesses 13 in the housing 3, which can be seen in FIG. 2.
  • the Hall probe 6 bridges the recess of the circuit carrier 1 and is fastened to the circuit carrier 1 by soldering, gluing or in another suitable manner on at least two sides of the recess.
  • the conductor 8 whose electrical current flow is to be measured, is inside the housing 3 enclosed by sub-segments 4 and 5. These extend along the conductor over the entire width of the interior of the housing 3 and thus largely shield the parts of the circuit carrier 1 lying outside the air gap against the magnetic field induced by the conductor 8. In this way, the control circuit located on the circuit carrier 1 is protected against interference from the current in the conductor 8.
  • Residual magnetization that may remain in the yoke after measuring a large current can be eliminated with the aid of the coil 10, which, when supplied with an alternating current, eliminates the residual magnetism in the yoke.
  • the control circuit can demagnetize as automatic at a suitable time, e.g. perform automatically before switching to a more sensitive current measuring range.
  • the lower sub-segment 4 When assembling the control unit, the lower sub-segment 4 is first inserted into the housing 3. The circuit carrier 1 with the Hall probe 6 arranged on it is then inserted into the housing 3 in such a way that the pin 9 engages in the cutout of the circuit carrier 1. After inserting the conductor 8, the upper sub-segment 5 with the coil 10 is placed on the lower sub-segment 4 and connected to the latter via the tongue and groove connection 7. It is a simple joining process. In the inserted state, the two sub-segments 4 and 5 and the coil 10 are fixed and held by the housing 3.
  • FIG. 3 shows a one-piece yoke 14 and a circuit carrier 1 of a further embodiment of a current sensor according to the invention.
  • a Hall probe 6 is fastened on the circuit carrier, which bridges a recess 15 in the circuit carrier 1, however, in contrast to the example described above, this recess 15 is open towards the yoke.
  • This configuration makes it possible to insert the circuit carrier 1 with the Hall probe 6 from the side into the air gap 16 of the yoke in such a way that the pin 9 provided in the air gap 16 engages in the recess 15 as in the previous example.
  • the circuit carrier shown in FIG. 3 with a recess 15 open to the edge with a two-part yoke, as shown in FIGS. 1 and 2 shown to combine.
  • an electrical current of high current flows through the conductor 8.
  • the conductor 8 is surrounded by a magnetic field which is guided by the soft magnetic subsegments 4 and 5 of the yoke.
  • the magnetic flux is guided in the yoke and passes vertically through both the air gap and the circuit carrier 1 and the Hall probe 6.
  • the Hall probe 6 detects the magnetic flux and passes the result on to the control circuit. A change in the current intensity therefore causes a direct change in the magnetic flux and detected by the Hall probe 6 provides the control circuit with the information on the basis of which it reacts in a preprogrammed manner.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
EP04008835A 2003-06-24 2004-04-14 Capteur de courant pour un appareil de contrôle Withdrawn EP1491902A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10328207 2003-06-24
DE10328207A DE10328207A1 (de) 2003-06-24 2003-06-24 Stromsensor für ein Steuergerät

Publications (1)

Publication Number Publication Date
EP1491902A1 true EP1491902A1 (fr) 2004-12-29

Family

ID=33394946

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04008835A Withdrawn EP1491902A1 (fr) 2003-06-24 2004-04-14 Capteur de courant pour un appareil de contrôle

Country Status (3)

Country Link
US (1) US20040263151A1 (fr)
EP (1) EP1491902A1 (fr)
DE (1) DE10328207A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100592978B1 (ko) 2004-04-21 2006-06-28 가부시키가이샤 덴소 자기갭을 구비한 전류센서

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7936164B2 (en) * 2008-07-03 2011-05-03 Allegro Microsystems, Inc. Folding current sensor
DE102008057512A1 (de) * 2008-11-15 2010-07-01 Diehl Aerospace Gmbh Verfahren zur Darstellung von Linienzügen
US9704637B2 (en) * 2013-07-15 2017-07-11 Texas Instruments Incorporated Method and apparatus for demagnetizing transformer cores in closed loop magnetic current sensors
KR101795326B1 (ko) * 2013-09-10 2017-11-07 몰렉스 엘엘씨 센서를 구비한 커넥터
US10114044B2 (en) 2016-08-08 2018-10-30 Allegro Microsystems, Llc Current sensor
US10247758B2 (en) 2016-08-08 2019-04-02 Allegro Microsystems, Llc Current sensor
DE102023207394A1 (de) * 2023-08-02 2025-02-06 Robert Bosch Gesellschaft mit beschränkter Haftung Strommessanordnung und Verfahren zur Montage einer solchen Strommessanordnung

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3482163A (en) * 1967-05-24 1969-12-02 Tektronix Inc Magnetic signal measuring device including degaussing means
US4639665A (en) * 1983-08-22 1987-01-27 Borg-Warner Corporation Sensing system for measuring a parameter
US4893073A (en) * 1989-01-30 1990-01-09 General Motors Corporation Electric circuit board current sensor
US5493211A (en) * 1993-07-15 1996-02-20 Tektronix, Inc. Current probe
JPH10253665A (ja) * 1997-03-14 1998-09-25 Matsushita Electric Ind Co Ltd 電流検出器
JP2000206153A (ja) * 1999-01-11 2000-07-28 Meidensha Corp 基板実装型電流検出装置
US6426617B1 (en) * 1999-09-28 2002-07-30 Rockwell Automation Technologies, Inc. Hall effect current sensor system packaging
JP2002243768A (ja) * 2001-02-21 2002-08-28 Stanley Electric Co Ltd 電流検出装置
US6545456B1 (en) * 1998-08-12 2003-04-08 Rockwell Automation Technologies, Inc. Hall effect current sensor package for sensing electrical current in an electrical conductor
WO2003056347A1 (fr) * 2001-12-27 2003-07-10 Matsushita Electric Industrial Co., Ltd. Detecteur de courant

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59609089D1 (de) * 1995-10-30 2002-05-23 Sentron Ag Zug Magnetfeldsensor und Strom- oder Energiesensor

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3482163A (en) * 1967-05-24 1969-12-02 Tektronix Inc Magnetic signal measuring device including degaussing means
US4639665A (en) * 1983-08-22 1987-01-27 Borg-Warner Corporation Sensing system for measuring a parameter
US4893073A (en) * 1989-01-30 1990-01-09 General Motors Corporation Electric circuit board current sensor
US5493211A (en) * 1993-07-15 1996-02-20 Tektronix, Inc. Current probe
JPH10253665A (ja) * 1997-03-14 1998-09-25 Matsushita Electric Ind Co Ltd 電流検出器
US6545456B1 (en) * 1998-08-12 2003-04-08 Rockwell Automation Technologies, Inc. Hall effect current sensor package for sensing electrical current in an electrical conductor
JP2000206153A (ja) * 1999-01-11 2000-07-28 Meidensha Corp 基板実装型電流検出装置
US6426617B1 (en) * 1999-09-28 2002-07-30 Rockwell Automation Technologies, Inc. Hall effect current sensor system packaging
JP2002243768A (ja) * 2001-02-21 2002-08-28 Stanley Electric Co Ltd 電流検出装置
WO2003056347A1 (fr) * 2001-12-27 2003-07-10 Matsushita Electric Industrial Co., Ltd. Detecteur de courant

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 14 31 December 1998 (1998-12-31) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 10 17 November 2000 (2000-11-17) *
PATENT ABSTRACTS OF JAPAN vol. 2002, no. 12 12 December 2002 (2002-12-12) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100592978B1 (ko) 2004-04-21 2006-06-28 가부시키가이샤 덴소 자기갭을 구비한 전류센서

Also Published As

Publication number Publication date
US20040263151A1 (en) 2004-12-30
DE10328207A1 (de) 2005-01-13

Similar Documents

Publication Publication Date Title
DE69729534T2 (de) Magnetischer Fühler
DE19680088B4 (de) Kalibrier- und Herstellungsverfahren für einen Magnetsensor
DE102008039568B4 (de) Stromerfassungsvorrichtung
DE3148754C2 (fr)
DE102015009603B4 (de) Vorrichtung zum messen eines elektrischen stromes durch eine stromschiene
DE68912639T2 (de) Hall-Effekt-Lagebestimmungssystem und -vorrichtung.
DE60210371T2 (de) Sitzpositionssensor
EP1772737A2 (fr) Module pour mesurer un courant
DE102007003830B4 (de) Vorrichtung zur Messung eines durch einen elektrischen Leiter fließenden elektrischen Stroms
DE102007000649A1 (de) Montageaufbau
DE102005036552A1 (de) Hochgenauer Stromsensor
DE112016002481T5 (de) Stromsensor
EP0464892A2 (fr) Disposition pour détecter un élément ferromagnétique en mouvement
DE60114622T2 (de) Positionsgeber für egr ventil (exhaust gas recirculation) mit orthogonalen zwei magneten und magnetwiderstaenden
DE10007868B4 (de) Elektronische Steuerschaltung
DE3523593A1 (de) Beschleunigungsmessgeraet
DE102006030412B4 (de) Elektromagnetventil
DE60015461T2 (de) Magnetlager
DE19824510A1 (de) Mangetischer Annäherungssensor für einen Gegenstand aus Eisen
EP1491902A1 (fr) Capteur de courant pour un appareil de contrôle
DE10108640A1 (de) Sensoranordnung zur kontaktlosen Strommessung
DE102020100443B4 (de) Stromsensor zum Messen eines einzuspeisenden Stroms mit asymmetrisch magnetfelddurchdrungenen Magnetflusssensoren
DE4418151B4 (de) Magnetfeldsensoranordnung
DE102005028572B4 (de) Stromsensoranordung mit einem Magnetkern
DE112021006268T5 (de) Stromsensor

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL HR LT LV MK

AKX Designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20050630